Specialized's Road Standard Presta Valve Tube is constructed using a molding method during which each tube is individually cured to ensure more consistent thickness throughout. It might sound insignificant, but if you've ever had small hops under your inflated tire or difficulty stuffing a tube in a fresh tire, you'll know how beneficial this construction is for reducing frustrations as a cyclist. The consistent thickness leads to smoother rolling on the road, which likely makes for a faster ride. The tubes are available in varying widths to pair with both road and off-road tires and have varying lengths of stems to ensure the valve clears your wheel's profile.